Guillaume was the son of unknown parents. The date and place of his birth have not been found.
His wife was Mahaut de Montgascon, who he married in 1295. The place has not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur de Bessay |
Note 1
fils de Guillaume I de Bourbon et Isabeau de Courtenay